Mastitis Treatments


Injectable containing penicillin, used to treat Strep. uberis mastitis in dairy cows and heifers

  • Cattle
  • AMR Class Green
    AMR Class Green
  • NZ Made
    NZ Made
  • Antibiotic

Masticillin™ is an injectable mastitis treatment for lactating dairy cows and heifers that contains procaine penicillin. It’s used to treat early season, multi-quarter mastitis, particularly Strep. uberis.

  • One vial = one cow
  • Ready to use! Just shake and inject
  • Plastic vials, meaning no more broken glass in dairy sheds
  • Registered for use in combination with Intracillin® 1000 MC for severe mastitis cases


  • Only one treatment is required, divided as two 15 ml injections on either side of the upper neck – one 30ml vial equals one cow.
  • Shake the vial vigorously until the product is evenly re-suspended.


It is an offence for users of this product to cause residues exceeding the relevant MRL in the Food Notice: Maximum Residue Levels for Agricultural Compounds.

  • Milk (twice-a-day): 132 hours / 11 milkings
  • Milk (once-a-day):  144 hours / 6 milkings
  • Meat: 10 days


Available in boxes of 4 x 30 ml plastic vials.


This product is classified as green under Antibiotic Judicious Use Guidelines for the New Zealand Veterinary Profession. Green light antimicrobials are for ­first line therapy under therapeutic conditions. Visit and talk to your Vet to learn more. Please use antibiotics responsibly.

To learn more about Masticillin™, download the Product Profile below and talk to your Vet. To learn more about mastitis, visit the mastitis page in our Health Care section.

Download SDS

Download Product Profile


Masticillin™ is a Restricted Veterinary Medicine. Available only under Veterinary Authorisation. Registered pursuant to the ACVM Act 1997, No. A8037.

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